Pneumatic displacement pump



Dec. 29, 1931. P. MONTANEY PNEUMATIC DISPLACEMENT PUMP .f4 als t l 11 BY y ATToRNEY Patented Dec. 29, 1931 Louis 1f. MONTANY, or Wni'mrcnnn, wasnrne'rou rnUMArrc ,nIsPLACMENi'r rung A'ppuiin flied otoir 9, 192e. serieu ira-140,440. y

This invention relatesgerierally to pneumatic displacement pumps and more'particu- '.arlyto improvements influid vpressure actuated valves for automatically controlling the 5 operations of said pumps; v p t Contemplatedfby the invention is the pro vision of pneumatic displacement pump or the submerged type, embodying means whereby the rsame isautomaticallyand positively maintained in a normally submerged condition, and embodying afluid pressure actuated valve, for automatically andpositively con# trolling the normal operations ofthev pump,l

having a` series of inlet exliaustlp'orts providcdwith spring-pressed t air sealing .clef vices, which 'function to positively and ee'ctually preventpassage of yfluid pressure between said rportsand which al'sofunctio'n and serve to automatically take up any wear oc'- curring in the Valve while iii use,'a'll of which are important objects of the invention'and are to be correlated inthe broad aim of enhancing the eiiiciency of the'pu'mp for general use. Y

The above, and additional objectswhich will hereinafter bef more specilicallytreated are attained by such means as are shownin the accompanying drawin s,A described in the following specification an l then more vclearly pointed out in the claims,jwhich are appended hereto and form part of this application.,v Y

llVith referermev to'4 thedrawings, in whichv there is illustrated one embodiment of the invention, and throughout the several Views of which like characters of reference designate similar parts.

Figure 1 ,is avertical medial section of a' pneumatic displacement pump fabricated in accordance with the invention, certain L parts 40 thereof'being lnelevation and certain other partsbeing omitted for clarity of illustration;

Fig. 2 is an enlargedvertical medial sec tion oi tlrepinnp control valve. y v y Fig. 3' is a verticalfvsectio'n of the same tallen through 3 3' of Fig. 2.

Figl t is a horizontal section' taken through 4 4 of Fig. 2, andV FiO. 5 is an enlargedV vertical medial sec-Y b h tion ofaspringpresse'd airsealing device employed with'the'pump control! valve, especiallygde'sizgned to take wear therein, as it would appear when removed therefrom;

y, Beginning the more detailed description theinveiitionby reference `to the'gdrawingsLtle numerals 1() Vvand 11, respectively, designateA pump cylinders or chambersclosed at "their lower ends by a common bottom cover or plate 12, and at their upper ends by a coinmon top coveror plate 13 rigidly secured to or upon the ends, of said pump cylinders in any lrnown orr suitable manner.

n Provided withr` the .bottom cover 12 and leading to the pump cylinders 10 and 11 are; inlet openings 14 controlled Vby foot valves" 15, Connected tosaid bottom cover-'412` and communicating withlsaid ypump cylinders are; outlet or discharge pipes r1b having check` valves 17 interposed therein, said outlet pipes being interconnected above and `adj acent said check )valvesto a common discharge pipeto'r rising main 18 leading and connected ,to a; water delivery/system, not shown. It has; been found particularly advantageousv and desirable in practice and after exhaustive en?` periinentatiori' to intI rpos'e with'nfth dis' n hmgerpelf; at a pont'pleferbly above, the pump cylinders, atan gr float` valve 19V," of `any suitab'letype,v actuated the Water the well, or othervservice of supply, for eiec-l tiiallycontrolling the level or such water and for positively preventingthesame from fall#l below the tops ofthe .pump "cylinders, inasmuh', `Vas the pump functions rnoreeliiV cientlylwhen the cylinders are vcompletely subirferged at all timethanwhen the same4 Vare not. this coiniectionlit bewell to state, that when the water falls below the pret determinedor selected level, it will be evidentV andapparent that tlievalve 19 will close and` that the coliininkof Water inthe dischargepipo 9 18jini conjunction with the flo'atof said valve will serve Aand function at'fsuch times Tto retain land maintain the'v'alve in a closed po-L sition against the action of the pneumatic i pressure in' either of the pump cylinders tend- 95 ingxto open the sama l Obviously, tl'ie'refore,`v closing or the valve 19 automatically stopstheVV pump and -no water may be withdrawn throi'igh the'discharge pipe 18 from the-well ,.f or other source of supply until the levelof 10 the water therein again rises above the predetermined minimum low point, in order that the pump may function elliciently and effectively.

Provided within the top cover 13, in concentric relation to the pump cylinders l() and 1l, are fluid pressure outlet openings or ports controlled by lioat actuated rubber-faced conical valves 2l seatable within the lower ends thereof and enclosed by cylindrical caps or casings 22 mounted within or upon the inner face of said top cover 13, said caps having the cylindrical walls adjacent the lower vends thereof perforated, whereby communication is established between the openings 2O and the pump cylinders l0 and ll when the valves 2l are unseated, will be readily apparent by referring to Fig. l. Rigidly sccured to the valves 21 are dependent stems or rods 3 guided at their upper ends for limited i axial movement within the caps 22 and at their lower terminals are provided with cylindrical floats or buoyant casmgs 24 actuated by the incoming and outgoing water'to seat and unseat the valves 2l, which latter when unseated' function as stops and abut the end walls of their correlated caps 22, as shown more clearly in Fig. l, to thereby positively limit their travel or downward movements.

Connected to the top cover 13 and communicating with the pump cylinders l() and 11 are fluid pressure delivery pipes 25 and fluid pressure exhaust or return pipes 26 closed, when the water level in the pump cyl y finders reach the tops thereof, by floats 2'? slida-bly mounted upon dependent stems 28 rigidly secured at their uppei` terminals within the said top cover 13. Connected to and communicating with the openings 2O are aux-A iliary fluid pressure exhaust pipes 29.

The numeral 30 designates a pump control valve casing or housing having fluid pressure supply ports 3l, wherewith the dclivery pipes are connected, and having fluid pressure exhaust ports 32, wherewith the exhaust pipes 26 are connected, while the auxiliary exhaust pipes 29 are connected to and communicate with the ends of said casing. Snugly seating for reciprocative movement within the casing 30 is a slide valve 33,

having a central fluid pressure inlet port 3e for alternate registration with the supply ports 31 thereof, and having liuid pressure exhaust ports 35 for alternate registration p, with the exhaust ports 32 of the same. The

slide valve 33 is positively secured within the valve casing 3() against unseating or dislodgment therefrom by a cover 36 rigidly securet thereto by stud bolts or cap screws 37. The

cover 36 is provided with duid pressure inlet ports 38 disposed in axially aligned relation With the supply ports 3l of the casing 30 for alternate registration with the inlet port 3l of the slide valve 33, and is also provided with fluid pressure exhaust ports 39 disposed in axially aligned relation with the exhaust ports 32 of said casing 30 for alternate registration with the exhaust ports 35 of said slide valve 33. Connected to and communieating with the inlet ports 38 of the valve cover 3G are branched fluid pressure supply pipes l() leading from a common and suitable source of fluid pressure, not shown.

Formed within the valve abutting face of the lasing 30 in concentric relation to the supply and exhaust ports 3l and 32 thereof and within the valve abutting face of the cover 3G in similar relation to the inlet ports 33 thereof are annular recesses or channels Tl-l, wherein spring-pressed sealing rings l2 are slidably seated having their inner terminal portions i3 exteriorly reduced for the reception of cup leathers la and cup leather retention washers or collars 45, which latter arc rigidly secured to the sealing rings l2 by crimping or riveting the ends of the portions 4l3 thereon, to thereby provide unitary air sealing structures of the type more clearly disclosed in Fig. 5. Interposcd between such unitary air sealing structures and the inner ends of lie annular recesses il are helical springs Lili foimaintaining the sealing rings 42 in proper contact with the lower and upper faces of the slide valve 33 to thus positively and ell'ectually prevent passage of fluid pressure between said valvev and the contiguous faces ofthe casing 30 and cover 3G, while also serving and functioning to automatically take up wear between said slide valve and said faces. Actual experience has lemonstrated the primary importance of properly lubricating the unitary air sealing structures to materially lessen any tendency of the same sticking within their correlated annular recesses /lO and to maintain the cup leathers of such structures in a soft pliablev condition whereby their air sealing qualities and properties are materially enhanced, this is accomplished by partially filling the annular recesses il with a suitable grease prior to the insertion therein of the unitary air sealing structures during the initial assem-v bling of the pump control valve or when said valve is being overhauled.

integrally formed within the valve casing 30 upon the end walls thereof are inwardly projecting abutment bosses 4:7, with which the ends of the slide valve alternately abut during rcciprocative movements of the same. and when in abutment with said bosses said valve ends are spaced from the end walls of the casing 30, in the manner shown at the left in Figs. 2 and Il, to thereby permit and positively insure of the exhaust Huid pressure from the auxiliary exhaust pipes 29 impinging uniformly and alternately upon the cntire area of each of said valve ends to effect reciprocation of the slide valve.

l To prevent reciprocation of the slide Avalve 33 when the pump is inactive, air bleeding or exhausting conduits/i8 are connected to and communicate with the ends of the valve cas ing 30,'whereby any fluid pressure which mayV become trapped in said ends for any reason is exhausted therefrom through said conduits to the atmosphere.

To obtain the best and most efficient results from the pump herein shown and described, such pump must be completely-submerged at all times, substantially in the manner. dis-v closed in Fig. 1, so that during the operation of the same, the pump cylinders 10 and11- may be completely and rapidly filled, the

floats 211 elevated to seat the valves 21, the :floats 27 elevated to close the pipes 25, and

26, and the ball valve 19 maintained in an open position to provide a. free and unobstructed passage through the discharge pipe 18. The pump will operate at any depth under water, but, unnecessary submergence will increase the lift of the pumpv without any correspondingadvantage accruingtherefrom. In this connection it may be well to state that, while the pump is completely and normally submerged, thecontrol valve thereof may be located at the top of the well or at any other convenient point, where it is readily accessible for inspection, overhauling, repairs or replacement. y

In practical operation the pump is operated by fluid pressure such as compressed air, which holds the water under pressure at all times, either in the 4pump cylinder 10 or theA pump cylinder 11, depending upon the position of the slide valve 38, as, for example.

assuming that the several mechanisms-of the pump are disposed in the positions illustrated in Figs. 1 to 4 inclusive, wherein it will be observed that the valve 21 of the puinp cylinder 1() has been seated by its float 24, and the delivery and exhaust pipes 25 and 26 of said pump cylinder have been closed by their float 27 while the valve21 of the pump cylinder 11 has been unseated by its float 24 to admit exhaust fluid pressure therefrom to the end of the valve casing 30 connected there-1v with, whereby the slide valve 33 has been actuated and moved to the position as shown,

to register the inlet port 34.- of said slidev valve with the valve casing supply port 31 and the valve coverinlet port 38 ofthe pump cylinder 10, so that the watercontained therein was directly subjected to and` instantly brought under air pressure andthe foot valve 15 thereof positively closed, as shown. With the slide valve 33 in the positionshown and described, the valve exhaust port 35, provided for the pump cylinder 11, registers with the valve casing` exhaust port 32 and the valve cover exhaust port 39, of sai-d pump cylin-v der, as ,more clearly shown 1n Fig. 3, whereby fluid pressure previously contained in the pump cylinder is exhausted' therefrom and water is caused to flow thereinto throughthe inlet opening 14 thereof, thelfoot valve 15 controlling' Asaid opening being elevated =by the. water flowing therethrough/.As the water flows into the pump` cylinder 11 the float 24 therein Vwill be elevated tov seat its: valve 21 and such water will continue to flow into said cylinder until the same is filled, whereat the float 27 thereof` will beV elevated.

to close :the delivery and exhaust pipes 25-` and 26 associated therewith, to thus prevent` anyI gritty or foreign matter, which may be` carriedlin suspension by said water from close its delivery and exhaustpipes25 andV 26, as hereinbeforedescribed I-Iowevi-ir,`

when a faucet ,or`valve, of the `water.4 delivery system, not shown, is opened, the airpres;

sure. inthe delivery pipe 25 connected with thepump cylinder 10.unseatsthe float 2f? and forces the watenstored therein downwardlyl and Y outwardly therefrom through the outlet 4pipe 16 andthence upwardly throughits checlc valve 17y and thev common rising main 18. Upon closing' of the faucet or valve, thel pump `willagain `be rendered inactive, and

if the amount of water Withdrawnpwhile the faucetwas open, was insufiicient to empty vt-he'cylinder 10, the water remaining therein will be heldunder air pressure, sothat when the faucet is again` openedsueh air pressure will force the water remaining in saidcylinder outwardly, therefrom through thel outlet pipel and rising main 18.` As the levely ofthe Water in the Acylinder 10 nears the lower end thereof the fioat 24 in said cylin` derV descends and unseats its valve 21, whereupon fluid pressure from the cylinder 10i is admitted to the end of the valve casing 30 connectedV therewith, to directly and uni,-

formly,impingethereat upon the adjacent end wall of theslide `valve 33 and move the latter tothe opposite end of said casing to reg-l ister the valve exhaust vport 35, provided for the pump cylinder 10, with the valvecasing port `32and the-valve cover port 39. of said pump cylinder, so that the fluid pressure therein is exhausted therefrom and Water `will flow thereinto through its inlet openinglt` following the elevating by the incoming water of the foot valve 15 controlling said opening. Simultaneously vwith the foregoing the exhaust ports of the pump cylinder 11 are 33 registers withthe valve casing supply port. 31 and; the valve coverl inlet. port 88 of said iio ` closed and the inlet port 34 ofthe slide valve y 1 ,y iso i. .il

pump cylinder, whereupon the air pressure in the delivery pipe uiiseats the float valve 27 of the cylinder and seats the foot valve 15 thereof, so that the Water stored in the cylinder is forced downwardly and outwardly through its outlet pipe 16 and thence upwardly through its check valve 17 and the common rising main 18 to the point of discharge. While Water is being drawn off or used the valves 21 of the pump cylinders 10 and 11 are alternately seated and uiiseated by their correlated lioats 24:, to thereby reciprocate the slide valve 33, as hereinbefore set forth, and upon the closing of the faucet or other discharge opening of the Water delivery system, the pump Will again be rendered inactive.

When the pump is operating under normal yWorking pressure complete reciprocative movements are positively imparted thereby to the slidevalve 33 and any tendency of such valve to stick in an intermediate position is eliminated or minimized. Actual vexperience has shown that if the Huid pressure is Sullicient to raise the Water ten feet or more, such pressure will completely throw or move the slide valve 33 its full travel in either direction and Will positively prevent rebounding of the same at the ends of its travel. However, if for any reason theV slide valve 33 should become stuck in an intermediate or dead center position, as for example, should such slide valve take a position to simultaneously close both the inlet and exhaust ports and thus become stalled, then and in that event fluid pressure is injected into the valve casingthrough one of the bleeder pipes 48, to thereby move the slide Valve 33 to the end of its travel Whereafter such valve Will function in a normal manner.

Maiiifestly, therefore, it is a primary purpose and aim of the invention to provide a control valve for a pneumatic displacement pump, that is extremely simple, durable and economical in construction, that is positive, ellicient andv reliable in use and operation, that is readily and conveniently accessibleJ that will not readily get out of order, and that embodies air sealing devices for the several ports thereof, which function to posi tively and ell'ectually prevent passage oi liuid pressure therebetween and to take up any Wear in said valve.

Vliile I have herein disclosed my invention With suliicient detail to enable those skilled in the art to understand the inode of construction. and the principles involved, it is to be understood, that there is no inten- 4tional limitation herein to the specific form Vand precise details of construction of the in-V vention shown and described, except as enl pressly delined by the appended claims, and that various modifications of such form and ,constructioii may be resorted to Without departing from the spirit of the invention or the benefits derivable therefrom. I also desire to have it understood that certain features of the invention herein disclosed, ma be employed in other combinations than those shown and described.

lVhat I claim as my invention, and desire to secure by Letters Patent, is:-

1. The combination With a pneumatic displacement pump control valve, of means for simultaneously bleeding both ends of .said valve when its correlated pump is inactive, said bleeding means being normally open to the atmosphere.

9.. The combination with a pneumatic dis' placement pump control valve, of means for simultaneously bleedingto the atmosphere air leakages from both ends of said valve during idle periods ofl its correlated pump, said bleeding' means being normally open to the atmosphere.

3. The combination With a pneumatic displacement pump control valve, of means for throwing valve over in me event ilie same bccame stalled in an intermediate position.

el. The conibination with a pneumatic displacement pump coiitrol valve, ci means for injectingfluid pressure into the valve casingl for moving the valve to the end of its travel in the event thc latter became stalled in an intermediate position.

5. The combination in a pneumatic displacement punip liavin` a valve controlled lluid pressure port, of a l'luid pressure sealing device for said port disposed .in concentric relation thereto for abutment with the valve controlling said port, and adapted to be positively maintained in abutment with said valve by the fluid pressure.

6. The combination in a pneumatic displacement pump having a valve controlled fluid pressure port, of a spring-pressed lluid pressure sealing` device for said port, dis posed in concentric relation thereto for abutment with the valve controlling said port. and adapted to be positively maintained in abutment With said valve conjointly by its correlated spring and the liuid pressure.

.7. The combination in a pneumatic displacement pump having valve controlled fluid pressure ports, of spring-pressed fluid pressure sealing devices individual to said ports and disposed substantially in concentric rela-tion thereto for abutment with the valve controlling the ports, said devices bein adapted to be positively maintained in abutment with said valve conjointly by their correlated spring and the fluid pressure.

8. The combination in a pneumatic displacement pump having a valve controlled fluid pressure port provided with an annular recess concentrically disposed in spaced relation thereto, of a fluid pressure sealing,r dcvice seated Within said recess for abutment With the valve controlling said port and adapted to be positively maintained in abutment with said valve by the tluid pressure.

9. The combination in r.a pneumatic displacement pump having a valve controlled tluid pressure port provided with an `annular recess concentrically disposed in spaced relation thereto, of a spring-pressed sealing device seated within said recess for abutment with the valve controlling said port and adapted to be positively maintained in abutment with said valve cepjointly by its correlated spring and the fluid pressure.

10. The combination in a pneumatic displacement pump control valve having a fluid pressure port, of a fluid pressure sealing device for said port disposed in concentric relation thereto for abutment with a com plemental sealing vface, and adapted tobe positively maintained in abutment with said face by the fluid pressure.

11. The combination in a pneumatic'displacement pump having a valve controlled iiuid pressure port provided with an annular recess concentrically disposed in spaced relation thereto, of a spring-pressed fluid pressure sealing ring slidably seated within said recess for abutment with the valve controlling said port and adapted to be positively maintained in abutment with said valve conjointly by its correlated spring and the iluid pressure. Y,

12. The combination in a pneumatic displacement pump, of a valve casing having inlet and exhaust i'luid pressure ports formed therein provided with annular recesses concentrically disposed in spaced relation thereto, a slide valve mounted within said casing having inlet and exhaust fluid pressure ports for alternate registration with the ports of said casing, and spring-pressed {iuid pressure sealing rings seated within said annular recesses for abutment .with said valve and adapted to be positively maintained in abutment therewith conjointly by their correlated springs and the Huid pressure.

13. The combination in a pneumatic displacement pump, of a valve casing having inlet and exhaust fluid pressure ports formed therein provided with annular recesses concentrically disposed in spaced relation thereto, a fluid pressure actuated valve mounted within said casing .having inlet and eXhaust iuid pressure ports for alternate registration with the ports of said casing, and springpressed fluid pressure sealing rings seated within said annular recesses forabutment with said valve and adapted to be positively maintainedin abutment therewith conj ointly by *their correlated springs and the fluid pressure.

lll. 'Ihe combination in a pneumatic displacement pump having a valve controlled fluid pressure port provided with an annular recess concentrically disposed in spaced relation thereto, of afluid pressure sealing ring seated within said recess for abutment with 'maintaining the sealing the valve controlling said port and a cup leather secured to said sealing ring whereby the Huid pressure is utilized to positivelyr maintain the sealing ring in abutment with said valve.

15. The combination` in a pneumatic dis-` placement pump having a valve controlled fluid pressure port provided with an annular recess concentrically disposed in spaced relation thereto, of a'luid pressure sealing ring- Y seated Within said recess for abutment with the valve controlling saidport, a compression spring for said sealing ring, and a cup leather secured to said ring' adjacent the inner end thereof, whereby the fluid pressure is utilized conjointly with said spring for positively ring in abutment with said valve. Y

16. The combination in a pneumatic displacement pump having a valve controlled fluid pressure port provided with an annular recess concentrically disposed inspaced relation thereto, of a fluid vpressure sealing ring having an eXteriorly reduced inner terminal, a compression spring for said sealing ring, a cup leather iXedly secured to said reduced inner terminal, whereby the fluid pressure is utilized con]l ointly with vsaid spring for positively'maintaining the sealing ring in abutment with said valve.

In testimony whereof I aix my signature.

LOUIS P. MONTANEY. 

